这种物质很容易由甲醛和肼反应而得到.The material is readily prepared by reaction of formaldehyde and hydrazine.甲醛能慢慢使多种病毒失去活性.Formaldehyde slowly inactivates many viruses.二氧化硫和甲醛都可产生刺激.Sulfur dioxide and formaldehyde both produce irritati...
High-rise buildings proved a social disaster.高层建筑证明是个社会灾难。...the disaster that befell the island of Flores.降临到弗洛里斯岛的灾难An investigation is underway to find out how the disaster happened.调查已经展开，以查明灾难是如何发生的。The mountain tor...
Do you usually watch movies at home or at a movie theater?你通常是在家看电影还是在电影院?You can go to a movie theater in Amsterdam and buy a beer.你可以在阿姆斯特丹的电影院里买到啤酒.This ticket will admit three children into the movie theater.这张票可允许三个...
单身的人往往更加无拘无束。People that are single tend to be more footloose.所有单身的全日制学生都必须住大学宿舍。All single full-time students must reside in university residence halls.已婚的人与单身的人通常有不同的人生观.Married people usually have a different view of ...